JP3227136B2 - Electromagnetic wave shielding door device and electromagnetic wave shielding coupling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electromagnetic wave shielding door device used in an electromagnetic wave shielding room or an anechoic chamber for opening and closing a closed portion formed on a wall having an electromagnetic wave shielding function, and an electromagnetic wave shielding door device. The present invention relates to an electromagnetic wave shielding coupling device used for a door device.

[0002]

2. Description of the Related Art Conventionally, for the purpose of measuring the radiated noise intensity of a device that generates noise that causes electromagnetic interference to other devices, and performing a malfunction test by irradiating a strong electromagnetic field to an electronic device. An anechoic chamber and an electromagnetic shielding room (hereinafter, these are referred to as an anechoic chamber) are used. The electromagnetic wave shielding room shields the room from electromagnetic waves by covering the entire room with an electromagnetic wave shielding material (hereinafter, also referred to as a shield).
It is supposed to. The anechoic chamber shields the room from electromagnetic waves by covering the entire room with electromagnetic wave shielding material, and by installing a radio wave absorber on the walls and ceiling of the room, prevents reflection of radio waves by the walls and ceiling It is supposed to.

[0003] In these anechoic chambers and the like, a door device is provided for entering and leaving an adjacent measurement room and the like. This door device is provided with an electromagnetic wave shielding material and a radio wave absorber, or an electromagnetic wave shielding material, similarly to the wall surface, and has an electromagnetic wave shielding function. Hereinafter, such a door device having an electromagnetic wave shielding function is referred to as an electromagnetic wave shielding door device.

Conventionally, the structure of an electromagnetic wave shielding door device provided in an anechoic chamber is roughly classified into two types. A first type of door device is disclosed in, for example, Japanese Patent Application Laid-Open No. 10-294.
As disclosed in Japanese Patent No. 591, a door provided with an electromagnetic wave shielding material and a radio wave absorber is configured to rotate using a hinge. The second type of door device has a structure in which a door provided with an electromagnetic wave shielding material and a radio wave absorber is moved in a direction orthogonal to a wall surface.

Here, the structure of these door devices will be briefly described. First, in the first type of door device, a door is arranged in an opening formed in a wall, and one side of the door is rotatably attached to the wall via a hinge. Both the wall and the door have an electromagnetic wave shielding material, and a radio wave absorber is provided on the indoor side surface. In this door device, the door has a structure that opens to the outside of the room.

In the second type of door device, for example, a door having an electromagnetic wave shielding material and a radio wave absorber is integrated with a bogie. The carriage moves in a direction perpendicular to the wall surface along a rail provided on the indoor side.

[0007]

In the above-mentioned door device, it is necessary to obtain a sufficient electromagnetic wave shielding characteristic between the opening and the door. Further, in the door device, it is desired that the floor surface in the opening is flat because the surface of the low-frequency magnetic field characteristic in an anechoic chamber and the measurement object pass through the opening.

For this reason, the door device disclosed in the above-mentioned publication belonging to the first type of door device is devised as follows. That is, in this door device, a door pressing mechanism for pressing the door main body against the door frame is mounted on the door main body. In the lower part of the door body, a lower elevating and lowering / pressing contact mechanism capable of ascending and descending and pressing against the floor surface is incorporated. The lower surface and the floor surface of the lower elevating / lowering mechanism are pressed against each other via a shield packing so as to exhibit an electromagnetic wave shielding function. In this door device, an electromagnetic wave shielding function between the upper and both sides of the door main body and the door frame is exhibited by the door pressing mechanism, and the door is raised and lowered by the lower elevating and pressing mechanism without any step on the floor surface. An electromagnetic wave shielding function between the main body and the floor is exhibited.

However, in this door device, since the shield packing is pressed against the floor surface, the shield packing may be damaged. In addition, the floor surface itself gradually deteriorates due to carry-in / out of the measurement object or the like. For these reasons, a slight gap is created between the door body and the floor surface. Then, even if the shield packing is pressed against the floor, it is not possible to fill the gap created between the door body and the floor, and the gap may affect the low-frequency magnetic field characteristics.

Further, if the floor surface becomes dirty or damaged, the electric contact resistance between the door body and the floor surface becomes large, and a problem arises that it is difficult to secure good electromagnetic wave shielding characteristics.

Further, as means for realizing an electromagnetic wave shielding function between the door body and the frame portion, a leaf spring-like finger member having an intermediate portion protruding is provided on one of the door body and the frame portion, and the other is provided with a finger. It is conceivable to provide a plate-like member that contacts the member. According to this means, it is possible to obtain better electromagnetic wave shielding characteristics than when shield packing is used. However, if this means is used for the joint between the lower part of the door body and the frame on the floor, there is a problem that the frame protrudes above the floor and a flat floor cannot be realized.

The present invention has been made in view of the above problems, and has as its object to provide an electromagnetic wave shielding door device and an electromagnetic wave shielding device capable of obtaining good electromagnetic wave shielding characteristics and realizing a flat floor surface. An object of the present invention is to provide a shielding coupling device.

[0013]

The electromagnetic wave shielding door device of the present invention is an electromagnetic wave shielding door device having an electromagnetic wave shielding function for opening and closing an opening formed in a wall having an electromagnetic wave shielding function. A door body having an electromagnetic wave shielding function and a frame provided around the opening and coupled to the door body are provided, and the frame is disposed on the floor surface so as to be connectable to a lower portion of the door body. It has an elevating part that can be raised and lowered so as to be able to select between a state and a state of being stored under the floor so as to form a flat floor surface, and further includes elevating means for elevating the elevating part. is there.

An electromagnetic wave shielding coupling device according to the present invention includes a door body having an electromagnetic wave shielding function, and a frame provided around an opening formed in a wall having an electromagnetic wave shielding function and coupled to the door body. Used in an electromagnetic wave shielding door device having an electromagnetic wave shielding function for opening and closing an opening, forming a part of a frame portion, and being arranged on a floor surface so as to be connectable to a lower portion of a door body. It is provided with an elevating unit which can be moved up and down so as to be able to select between a state in which it is stored under the floor so as to form a flat floor surface, and an elevating means for elevating the elevating unit.

In the electromagnetic wave shielding door device or the electromagnetic wave shielding coupling device according to the present invention, when the door body is opened, a flat floor surface is formed by storing the elevating portion below the floor surface. Further, when the door body is closed, by disposing the elevating part on the floor surface, the elevating part and the lower part of the door body can be connected.

In the electromagnetic wave shielding door device or the electromagnetic wave shielding coupling device according to the present invention, the elevating unit may be, for example, a coupling unit coupled to a lower part of the door main body, and a floor unit when stored under the floor surface. And a top part forming a part.

In the door device for shielding electromagnetic waves according to the present invention,
The door body and the frame may each have an electrical connection means for making an electrical connection between the frame and the door body when they are connected to each other.

Further, in the electromagnetic wave shielding coupling device according to the present invention, the elevating unit has an electric connection means for making an electric connection with the door body when coupled with the lower part of the door body. You may.

Further, in the electromagnetic wave shielding door device or the electromagnetic wave shielding coupling device of the present invention, the elevating means may be operated manually, may be operated electrically, or may be interlocked with the door body. It may work with.

According to another aspect of the present invention, there is provided an electromagnetic wave shielding door apparatus having an electromagnetic wave shielding function for opening and closing an opening formed in a wall having an electromagnetic wave shielding function. A door body having a function, and a frame provided around the opening and coupled to the door body are provided, and the door body is arranged so as to be arranged on the floor surface and protrude below the floor surface. A first connecting portion that can be moved up and down so as to be able to select a state, and an elevating means for moving up and down the first connecting portion; the frame portion is disposed below the floor surface; And a second coupling portion that is disposed in the groove portion and that can be coupled to the first coupling portion in a state where it is disposed so as to protrude below the floor surface, and a groove portion. Over,
And a floor portion forming a part of the floor surface.

In this electromagnetic wave shielding door device, when the door body is moved, the first connecting portion is arranged on the floor surface. Further, when closing the door body, the first connecting portion is disposed so as to protrude below the floor surface, and is connected to the second connecting portion disposed below the floor surface. When the door body is opened, a flat floor surface is formed by covering the groove with the floor surface portion.

In another electromagnetic wave shielding door apparatus according to the present invention, when the door main body and the frame are respectively connected to each other, an electric connection is made between the frame and the door main body for electrical connection. You may have a connection means.

[0023]

Embodiments of the present invention will be described below in detail with reference to the drawings. [First Embodiment] First, an anechoic chamber to which an electromagnetic wave shielding door device according to a first embodiment of the present invention is applied will be described with reference to FIG. FIG. 1 is a plan sectional view showing an example of a configuration of a test facility including an anechoic chamber in the present embodiment. The test equipment shown in this figure is used to measure the radiated noise intensity of equipment that generates noise that causes electromagnetic interference to other equipment, and to test malfunctions by irradiating electronic equipment with strong electromagnetic fields. Is what is done.

The test equipment shown in FIG.
And a measurement room 120 which is an electromagnetic shielding room for measurement arranged adjacent to the anechoic chamber 110 and an electromagnetic shielding room 130. A large shield door 111 for loading and unloading the test object is placed in the anechoic chamber 110.
And an electromagnetic shielding door device (hereinafter simply referred to as a door device) 1 according to the present embodiment, which is a small shield door for entering and exiting from the measurement room 120.

The anechoic chamber 110 has a floor 113, four walls 1
14 and a ceiling (not shown), all of which are provided with an electromagnetic wave shielding plate made of an electromagnetic wave shielding material. Wall 1
A radio wave absorber 115 is attached to the indoor side surface of the ceiling 14 and the ceiling. The floor 113 is provided with a turntable 116 for rotating the test object. The floor 111 is provided with an antenna positioner 117 where the antenna is installed.

The electromagnetic wave shielding material is a material having a large reflection coefficient (close to 1) and a small transmission coefficient (close to 0) with respect to electromagnetic waves in a desired frequency band. Often used.

The radio wave absorber is a structure that has a small reflection coefficient and a low transmission coefficient (close to zero) for radio waves in a desired frequency band, and absorbs incident radio wave energy to convert it into heat energy.

The radio wave absorber 115 in FIG. 1 is composed of, for example, a tile-shaped ferrite radio wave absorber and a styrofoam-based radio wave absorber attached to the indoor surface of the ferrite radio wave absorber. A ferrite radio wave absorber is a radio wave absorber that utilizes the magnetic resonance loss of ferrite at a high frequency. The Styrofoam-based radio wave absorber is composed of a Styrofoam base mixed with carbon as a resistor.

Next, a door device 1 according to the present embodiment will be described with reference to FIGS. In the following description, the inside of the anechoic chamber 110 will be referred to as the room, and the anechoic chamber 1 will be described.
Outside 10 is called outdoor. FIG. 2 shows a door device 1 viewed from the outdoor side.
FIG. 3 is a front view of the door device 1 seen from the outdoor side,
FIG. 4 is a side view of the door device 1, and FIG. 5 is a plan view of the door device 1.

The door device 1 is provided around a door body 10 having an electromagnetic wave shielding function, a support portion 15 for rotatably supporting the door body 10, and an opening formed in a wall of the radio wave anechoic chamber. A frame 50 is provided for coupling to the door body 10.
In the present embodiment, the support portion 15 is provided on the left side of the door body 10 when viewed from the outdoor side, but may be provided on the right side. The left end portion of the door body 10 and the support portion 15
They are connected by a rotation mechanism 30. The support part 15 and a part of the rotation mechanism part 30 on the support part 15 side are
Is covered by a cover 31 fixed to the cover. A part of the rotation mechanism 30 on the door body 10 side is covered by a cover 32 fixed to the door body 10.

The door body 10 is made of an electromagnetic wave shielding material. A circular opening / closing handle 11 is provided on the outdoor surface of the door body 10. A circular opening / closing handle 12 is provided on the outside surface of the door body 10. The opening / closing handles 11 and 12 are connected inside the door body 10 and are interlocked.

At four positions corresponding to the left and right ends of the door body 10 and the frame 50, fastening devices 20 called eccentric clampers are provided. Fastening device 20
Are provided at positions above the opening / closing handles 11 and 12, and are provided at positions below the opening / closing handles 11 and 12.
Are provided. The fastening device 20 on the left side in FIG. 2 is covered by covers 31 and 32.

The fastening device 20 includes a rotatable cam portion 20A attached to the door main body 10, and a cam groove portion 20B attached to the frame portion 50. The cam portion 20A is
It has a pin eccentrically arranged with respect to the center of rotation. On the other hand, the cam groove 20B has an arc-shaped groove for guiding the pins of the cam 20A.

A shaft 21 extending in the horizontal direction is connected to each cam portion 20A. The shaft 21 is connected to the opening / closing handles 11 and 12 via a rotation transmission mechanism such as a bevel gear (not shown) and a reduction mechanism. The rotation transmission mechanism and the speed reduction mechanism are covered by a cover 22 attached to the door body 10.

With such a mechanism, the opening / closing handle 1
By rotating the camshafts 1 and 12, each cam portion 20A is simultaneously rotated. Here, opening and closing handle 1
When 1 is at the stop position in the counterclockwise direction, the cam portion 20A
Is located at a position where it enters the groove of the cam groove 20B. Then, after the pin of the cam portion 20A enters the groove of the cam groove portion 20B, when the opening / closing handle 11 is rotated in the clockwise direction, the pin of the cam portion 20A is
0B, the cam portion 20A and the cam groove portion 20B are fastened, and the door body 10 and the frame portion 50 are tightly fastened.

In this embodiment, a circular opening / closing handle 1 is used.
1, 12 and the open / close handles 11, 1
2 is transmitted to the cam portion 20A via the speed reduction mechanism. In such a configuration, for example, compared to a case where the cam portion 20A is operated using a lever, the door body 1
Although the amount of operation at the time of opening and closing 0 increases, the required force is small. For example, when operating the cam portion 20A using a lever, a force of about 30 kgf is required,
In the case of the present embodiment, about 7 kgf is sufficient, and even a weak person or a woman can easily operate.

The cover 22 has an opening / closing handle 1 inside.
Handle stopper 2 which moves forward and backward in conjunction with the rotation of 1, 12
3 are provided. When the opening / closing handle 11 is turned in the clockwise direction, the end of the handle stopper 23 projects from the right end of the door body 10 in FIG. In the frame portion 50, the handle stopper 2
At a position corresponding to No. 3, a handle stopper receiving portion 24 against which an end of the handle stopper 23 abuts is provided. When the end of the handle stopper 23 abuts on the handle stopper receiving portion 24, the rotation of the opening / closing handle 11 in the clockwise direction is stopped.

A stopper fitting 26 is attached near the lower right end of the exterior surface of the door body 10.
A door stopper 27 with which a stopper fitting 26 is engaged is provided on the floor near the left wall of the door body 10 when viewed from the outdoor side.
Is provided. When the door body 10 is opened, the stopper fitting 26 engages with the door stopper 27, and the door body 1 is opened.
0 is fixed. When the pedal of the door stopper 27 is depressed, the engagement between the stopper fitting 26 and the door stopper 27 is released.

Next, the connection between the door body 10 and the frame 50 will be described. The door body 10 is provided with a connecting portion 41, and the frame portion 50 is provided with a connecting portion 51. The connecting portions 41 and 51 are connected to each other. The coupling portions 41 and 51 are provided at a peripheral portion of a portion where the door body 10 and the frame portion 50 face each other.

The connecting portion 41 is composed of two parallelly arranged
It has two grooves 42 and 43. The width of the outer groove 42 is smaller than the width of the inner groove 43. On the other hand, the coupling portion 51 is located at a position corresponding to the groove portions 42 and 43.
It has two plate-like portions 52 and 53 inserted into 43. The coupling portions 41 and 51 are formed of a metal having good conductivity, for example, a copper alloy or stainless steel. Also,
The joints 41 and 51 are subjected to a special surface treatment such as plating nickel on a copper alloy as necessary in order to prevent rust and the like and suppress deterioration.

Although not shown, a leaf spring-like finger member having an intermediate portion protruding inward is attached in the groove 42. This finger member is
Two are provided so that the plate-shaped part 52 inserted into it may be sandwiched from both sides. The finger member is formed of a metal having good conductivity, for example, a copper alloy, stainless steel, or a copper alloy plated with nickel. The finger member and the plate-shaped portion 52 correspond to the electric connection means in the present invention.

By connecting such connecting portions 41 and 51, electrical continuity is achieved between the two, and the connecting portion 4
An electromagnetic wave shielding function between the members 1 and 51 is exhibited. In the present embodiment, the coupling portions 41 and 51
When the two are coupled, the plate portions 52 and 53 of the coupling portion 51 enter into the grooves 42 and 43 of the coupling portion 41. According to such a structure, the coupling portion 4
Electromagnetic waves are less likely to leak between the first and the first portion 51 and the coupling portion 4
The electromagnetic wave shielding function between the members 1 and 51 is strengthened. Furthermore, in the present embodiment, the electrical conduction between the coupling portions 41 and 51 is reinforced by the finger member provided in the groove 42 of the coupling portion 41 and the plate-shaped portion 52 of the coupling portion 51 contacting each other. Thus, the electromagnetic wave shielding function between the coupling portions 41 and 51 is enhanced.

The groove 43 of the connecting portion 41 and the connecting portion 51
The plate-like portion 53 may be provided only at a portion where the electromagnetic wave shielding function is to be enhanced, for example, only at four corners.

When the door device 1 is used in the anechoic chamber 110, a radio wave absorber such as a ferrite radio wave absorber is attached to the indoor surface of the door body 10. Door device 1
When used in an electromagnetic wave shielding room, there is no need to attach a radio wave absorber to the door body 10. However, for example, the electromagnetic wave shielding performance can be improved by attaching a ferrite radio wave absorber to at least the peripheral portion of the door body 10.

In the present embodiment, the frame portion 50 is
0 can be selected from a state in which it is arranged on the floor surface so as to be able to be combined with the coupling portion 41 in a lower part of the floor and a state in which it is stored under the floor surface so as to form a flat floor surface. It has a part 60.

The lifting unit 60 will be described below in detail with reference to FIGS. FIG. 6 is a front view of the elevating unit 60 arranged on the floor, FIG. 7 is a cross-sectional view of the elevating unit 60 arranged on the floor and combined with the door body 10, and FIG. It is sectional drawing of the raising / lowering part 60 in the state accommodated under the floor.

The elevating unit 60 has a connecting part 51 connected to the connecting part 41 of the door body 10. This connecting portion 51
The coupling portion 41 has two plate-like portions 52 and 53 inserted into the grooves 42 and 43. FIG. 7 shows the finger member 44 provided in the groove 42.

Below the floor, a space 61 in which the elevating unit 60 can be stored is formed. In this space 61, the lifting unit 6
A rail 62 is provided for guiding in the vertical direction. An engaging portion 63 that engages with the rail 62 is provided below the elevating portion 60.

As shown in FIGS. 6 and 7, the elevating section 60 is connected to another portion of the frame section 50 when it is arranged on the floor. In this state, the connecting portion 5 of the elevating portion 60
1 can be connected to the connecting portion 41 of the door body 10. In addition, as shown in FIG. 8, when the lifting unit 60 is stored in the space 61 below the floor, the upper surface thereof is at the same height as the floor, and forms a flat floor. Therefore, in this state, the passage of the cart 80 or the like for transporting the measurement object or the like becomes easy.

In the wall, the side 64 of the elevating unit 60
A finger member for making an electrical connection with the lifting / lowering unit 60 is provided at a position where (FIG. 6) contacts.

Next, with reference to FIGS. 9 and 10, a description will be given of an elevating mechanism for elevating the elevating unit 60. FIG. FIG.
FIG. 10 is an explanatory view showing a lifting mechanism, and FIG. 10 is a perspective view showing a handle for operating the lifting mechanism. In the present embodiment, the elevating mechanism operates manually. As shown in FIG. 9, a roller 71 is attached to a lower portion of the elevating unit 60. In the space 61, below the roller 71, a plate cam 72 that contacts the roller 71 is provided.
Is provided. A rack 73 is connected to the plate cam 72. A gear 74 that meshes with the rack 73 is provided above the rack 73. A reduction gear 75 is connected to the gear 74. As shown in FIG. 10, the input shaft 75a of the speed reducer 75 is exposed on the floor. A handle 76 is detachably connected to the input shaft 75a.

When the elevating mechanism 60 is moved up and down using this elevating mechanism, the handle 76 is connected to the input shaft 75a of the speed reducer 75, and the handle 76 is turned. The rotation of the handle 76
The power is transmitted to the gear 74 at a predetermined ratio via the speed reducer 75. When the gear 74 rotates, the rack 73 and the plate cam 7
2 moves horizontally. Then, the roller 71 and the elevating unit 60 move up and down along the upper surface of the plate cam 72.

The elevating unit 60 and the elevating mechanism correspond to the electromagnetic wave shielding coupling device of the present invention.

Next, referring to FIG.
Will be described. FIG. 11 is a plan view showing the configuration and operation of the rotation mechanism 30. The rotation mechanism 30 has a connecting member 34. One end of the connecting member 34 is connected to the shaft 3
3 and rotatably connected to the support portion 15. The other end of the connecting member 34 is rotatably connected to the door body 10 via a shaft 35. That is, in the turning mechanism 30, the door body 10 is
5 is connected rotatably around two shafts 33 and 35.

Here, the features of the rotating mechanism 30 in the present embodiment will be described. In a conventional pivotable door device, the door body is supported by a hinge so as to be pivotable about one central axis. With such a structure, when the door body is rotated in the closing direction from the opened state of the door body, the door body always performs a rotational movement about the central axis, so that the connecting portion of the door body is The groove in
It enters obliquely with respect to the plate-shaped member at the joint of the frame. For this reason, conventionally, in order to make the groove of the door body enter the plate-like member of the frame portion in parallel, immediately before closing the door body, the joint portion of the door body is pushed into the joint portion of the frame portion by human power. Was like that. But with this, hinges,
An excessive force is applied to the connecting portion of the door body and the connecting portion of the frame portion, and these are deformed. As a result, in the related art, the state of connection between the connecting portion of the door body and the connecting portion of the frame portion is deteriorated, and the finger member provided at the connecting portion of the door body deteriorates quickly, and electromagnetic wave shielding performance deteriorates. There was a point.

In the rotating mechanism 30 according to the present embodiment, when the door body 10 is rotated from the open state as shown by the broken line in FIG. Rotates around the shaft 33 and immediately before the door main body 10 is connected to the frame 50, as shown by the two-dot chain line, the grooves 42, 43 in the connecting portion 41 of the door main body 10.
Are plate-like members 52 and 53 in the joint portion 51 of the frame 50.
Is in parallel with. From this state, the door body 10
Is closer to the frame portion 50, the connecting member 34 is inclined with respect to the wall. However, since the door body 10 rotates about the shaft 35 with respect to the connecting member 34, The groove portions 42 and 43 in the portion 41 maintain the state parallel to the plate-like members 52 and 53 in the joint portion 51 of the frame portion 50, and the joint portion 41 of the door body 10 and the joint portion 51 of the frame portion 50 are maintained. Can be combined. Therefore, according to the rotation mechanism 30 in the present embodiment, the door body 10
The coupling state between the coupling section 41 and the coupling section 51 of the frame 50 can be prevented from deteriorating, and the finger member provided on the coupling section 41 of the door body 10 can be prevented from deteriorating, and good electromagnetic wave shielding performance is maintained. be able to.

Next, the operation of the door device 1 according to this embodiment will be described. First, when closing the door body 10, as shown in FIGS. 2, 4, 6, and 7, the elevating unit 60 is raised to be placed on the floor, and To the part. Next, the door body 10 is moved closer to the frame portion 50, and the connecting portion 41 of the door body 10 is connected to the connecting portion 51 of the entire frame portion 50 including the elevating portion 60. Next, the handle 11 or the handle 12 is rotated, and the door body 10 and the frame 50 are fastened by the fastening device 20.

When the door body 10 is opened, the handle 11 or the handle 12 is rotated in a direction opposite to the direction in which the door body 10 is closed.
0 and release the fastening. Next, the door body 10 is opened. Next, as shown in FIG. 8, the elevating part 60 is lowered and stored in the space 61 below the floor. In this state, the lifting unit 60
Has the same height as the floor surface to form a flat floor surface.

When raising or lowering the lifting unit 60, as shown in FIG.
5 is connected to the input shaft 75a, and the handle 76 is rotated. The rotation of the handle 76 is transmitted to the gear 74 via the speed reducer 75 at a predetermined ratio. When the gear 74 rotates,
The rack 73 and the plate cam 72 move in the horizontal direction, and the roller 71 and the elevating unit 60 move up and down along the upper surface of the plate cam 72.

As described above, the door device 1 according to the present embodiment forms a part of the frame portion 50 and is arranged on the floor so as to be connectable to the connecting portion 41 at the lower portion of the door body 10. A lifting unit 60 that can be moved up and down so as to be able to select between a state in which the floor is held and a state in which the floor is stored under the floor so as to form a flat floor. Therefore, according to the door device 1 according to the present embodiment, when the door body 10 is closed, the door body 10
And the coupling portion 51 of the frame portion 50 can obtain good electromagnetic wave shielding characteristics. Further, according to the door device 1 according to the present embodiment, when the door main body 10 is opened, a flat floor surface can be realized by storing the lifting unit 60 below the floor surface. In this case, good low-frequency magnetic field characteristics can be obtained, and the loading and unloading of a measured object and the like can be easily performed.

According to the present embodiment, the elevating unit 60
, The connecting portion 5 to be connected to the connecting portion 41 of the door body 10
1 is provided in a place different from the upper surface portion which becomes a part of the floor surface when stored under the floor surface, so that the upper surface portion of the elevating portion 60 is not stained or damaged by carrying in / out of the measurement object or the like. Even if it occurs, the coupling part 51 is not stained or damaged, and the electromagnetic wave shielding performance of the door device 1 is prevented from deteriorating due to the transfer of the measurement object or the like.

According to the present embodiment, the door body 10
Since the finger member 44 and the plate-shaped portion 52, which are the electrical connection means, are provided at the connecting portion 41 of the connecting portion 41 and the connecting portion 51 of the frame portion 50, the electromagnetic wave shielding performance can be further improved.

[Second Embodiment] Next, a second embodiment of the present invention will be described with reference to FIG. FIG. 12 is an explanatory diagram illustrating a schematic configuration of the door device according to the present embodiment. The door device according to the present embodiment includes a lifting unit 6
The lifting mechanism for raising and lowering 0 is operated by electric power. In the present embodiment, as shown in FIG. 12, a motor 8 for raising and lowering the lifting unit 60 is provided below the floor.
1 and a control circuit 82 for controlling the motor 81 are provided. The input shaft of the speed reducer 75 is connected to the output shaft of the motor 81. In the present embodiment, an operation unit 83 for operating the elevating unit 60 is provided on a wall near the door body 10. The operation unit 83 is connected to the control circuit 82. The operation unit 83 includes the lifting unit 60
Push button 83a for instructing the ascending
And a push button 83b for instructing a decrease of 0.

In this embodiment, when the push button 83a of the operation unit 83 is pressed, the motor 81 rotates in a predetermined direction,
When the elevating unit 60 moves up and pushes the push button 83b of the operation unit 83, the motor 81 rotates in the opposite direction, and the elevating unit 60 descends.

Other configurations, operations, and effects of the present embodiment are the same as those of the first embodiment.

[Third Embodiment] Next, a third embodiment of the present invention will be described with reference to FIG. FIG. 13 is an explanatory diagram illustrating a schematic configuration of the door device according to the present embodiment. The door device according to the present embodiment includes a lifting unit 6
An elevating mechanism for raising and lowering 0 operates in conjunction with the door body 10. In the present embodiment, as shown in FIG. 13, a shaft 84 that rotates in conjunction with the rotation of the connecting member 34 of the rotation mechanism 30 is provided. This axis 84
Is connected to the input shaft of the speed reducer 75.

In this embodiment, when the door body 10 is turned in the closing direction, the connecting member 34 of the turning mechanism 30 is turned in a predetermined direction, and the shaft 84 is moved in the predetermined direction in conjunction with this. The input shaft of the speed reducer 75 rotates. Then, the elevating unit 60 moves up. Conversely, when the door body 10 is turned in the opening direction, the connecting member 34 of the turning mechanism 30 turns in the opposite direction, and in conjunction with this, the shaft 84 turns in the opposite direction. The input shaft rotates. Then, the elevating unit 60 descends.

In the present embodiment, immediately before the connecting portion 41 of the door body 10 and the connecting portion 51 of the frame portion 50 are connected, the elevating portion 60 reaches the highest position.
The shape of the plate cam 72 is set so that the position of the elevating unit 60 does not change between the state immediately before the couplings 1 and 51 are coupled and the state where the coupling units 41 and 51 are completely coupled.

Other configurations, operations and effects of the present embodiment are the same as those of the first embodiment.

[Fourth Embodiment] Next, a fourth embodiment of the present invention will be described with reference to FIG. FIG. 14 is a side view of the door device according to the present embodiment. In the door device according to the present embodiment, the door body moves in a direction perpendicular to the wall surface.

The door device 201 according to the present embodiment includes a frame 5 provided around an opening formed in a wall of an anechoic chamber.
0, a door body 220 having an electromagnetic wave shielding function and coupled to the frame portion 50, and a carriage 240 capable of moving the door body 220 linearly in a direction orthogonal to the wall surface.

The door body 220 is made of an electromagnetic wave shielding material. A radio wave absorber 221 is attached to a surface of the door body 220 on the indoor side. This radio wave absorber 22
1 is, for example, a tile-shaped ferrite radio wave absorber 222 attached to the indoor side surface of the door body 220, a styrofoam base radio wave absorber 223 attached to the indoor side surface of the ferrite radio wave absorber 222, It is constituted by. The end on the indoor side of the Styrofoam-based radio wave absorber 223 is covered and protected by a protection board 224.

The cart 240 is disposed on the indoor side, and the end on the outdoor side is joined to the door body 220. Trolley 240
Has a total of four wheels 241, two on each side. On the floor surface in the anechoic chamber, from the opening formed in the wall to a predetermined position, the door body 220 and the carriage 24
So that 0 can move linearly in the direction perpendicular to the wall,
Two rails for guiding the door body 20 and the carriage 40 are provided. A radio wave absorber, for example, a tile-shaped ferrite radio wave absorber 243 is attached to an outer peripheral portion of the cart 240.

The door body 220 has a door body 2
A handle (not shown) for pushing / pulling 20 is provided. The door body 220 has a door body 2 on the indoor side surface.
A handle 226 for pushing and pulling 20 is provided. An opening / closing lever 227 is further provided on the outdoor surface of the door body 220. The opening / closing lever 227 is attached to the door main body 220 so as to be able to rotate up and down. An emergency release lever 242 is provided at a position near the indoor end of the carriage 240. The emergency release lever 242 is rotatable in the left-right direction.
It is attached to the door body 220.

At four positions corresponding to each other on the frame portion 50 and the door main body 220, fastening devices called eccentric clampers are provided. The fastening device includes an opening / closing lever 227.
Two are provided at a position above the opening lever 227, and two are provided at a position below the opening / closing lever 227.

The fastening device includes a rotatable cam 250A attached to the door body 220 and a cam groove (not shown) attached to the frame 50. Cam part 250
A is linked to the opening / closing lever 27 and the emergency opening lever 42.

The door body 220 is provided with a connecting portion 41 similar to that of the first embodiment. The frame unit 50 has a lifting unit 60 as in the first embodiment. The frame portion 50 including the elevating portion 60 is provided with a connecting portion 51 that is connected to the connecting portion 41. The elevating mechanism for elevating the elevating unit 60 is the same as in the first or second embodiment.

In the door device 201 according to the present embodiment, the door body 220 and the bogie 240 move linearly in a direction perpendicular to the wall surface to perform the opening / closing operation.

Other configurations, operations and effects of the present embodiment are the same as those of the first or second embodiment.

[Fifth Embodiment] Next, a fifth embodiment of the present invention will be described with reference to FIGS. FIG. 15 is an explanatory view conceptually showing a main part of the door device according to the present embodiment, FIG. 16 is a cross-sectional view showing a main part of the door device according to the present embodiment, and FIG. It is sectional drawing which shows the other states of the principal part of the door apparatus which concerns on a form.

The door device according to the present embodiment has an electromagnetic wave shielding function, and can be rotated similarly to the first embodiment. And a frame portion coupled to the door body 10.

In the door body 10 according to the present embodiment, the connecting portion 41 according to the first embodiment is not provided at the lower portion, and the connecting portion 41 according to the first embodiment is provided at other peripheral portions except the lower portion. A part 41 is provided. A coupling device 310 is provided below the door body 10 in the present embodiment. The coupling device 310 has a housing 311. An opening 311a is formed in a lower part of the housing 311. The coupling device 310 further includes a coupling portion 312 that can be moved up and down so as to be able to select between a state of being disposed on the floor surface and a state of being disposed so as to project below the floor surface, and a device for moving the coupling portion 312 up and down. Lifting mechanism. The connecting portion 312 and the elevating mechanism are housed in a housing 311. The joint 312 has a groove parallel to the floor. Two finger members are provided in the groove so as to oppose each other in the vertical direction.

The lifting mechanism has the following configuration. As shown in FIG. 15, two racks 313 movable in the front-rear direction are joined to the upper end of the coupling portion 312 near both ends in the longitudinal direction, as shown in FIG. Rack 31
3, a pinion 314 meshing with the rack 313 is provided.
Is provided. The shaft 315 is connected to the pinion 314. The output shaft of the motor 316 is connected to the shaft 315 via a speed reducer (not shown). Motor 31
6 is attached to a movable plate 318 via a holding member 317. It should be noted that the connecting portion 312 and the rack 313
Is held by a movable plate 318 via a holding member (not shown) so as to be movable in the front-rear direction.

The movable plate 318 is held by a housing 311 via a holding member (not shown) so as to be vertically movable. Two racks 319 are mounted near both ends of the movable plate 318 in the longitudinal direction.
A pinion 320 that meshes with the rack 319 is provided in the housing 311. The pinion 320 has a shaft 3
21 are connected. The output shaft of the motor 322 is connected to the shaft 321 via a speed reducer (not shown). The motor 322 is connected to the housing 31 via a holding member (not shown).
1 is held.

The motors 316 and 322 are controlled by a control unit (not shown).

On the other hand, the frame in this embodiment is
Instead of the elevating unit 60 in the embodiment, a connecting unit 323 provided below the floor surface is provided. This connecting part 323
Has a plate-like portion inserted into the groove of the coupling portion 312. The coupling portions 312 and 323 are formed of a metal having good conductivity, for example, a copper alloy or stainless steel.
Further, the joints 312 and 323 are subjected to a special surface treatment such as plating nickel on a copper alloy as necessary in order to prevent rust and the like and suppress deterioration. In addition, the joint 312 corresponds to a first joint in the present invention, and the joint 323 corresponds to a second joint in the present invention.

A groove 301 for guiding the joint 312 to the joint 323 is formed below the floor. An elevating plate 302 capable of elevating and lowering, and an elevating mechanism 303 for elevating the elevating plate 302 are provided in the groove 301. The lifting plate 302 selectively covers the groove 301 and forms a part of the floor surface. Lifting plate 3
02 is formed of an electromagnetic wave shielding material. When the lifting plate 302 is raised, the upper surface thereof is at the same height as the floor surface to form a flat floor surface. When the lifting plate 302 is lowered, a passage for guiding the coupling portion 312 to the coupling portion 323 is formed in the groove portion 301. The lifting plate 302 corresponds to the floor surface in the present invention. The configuration of the elevating mechanism 303 can be the same as, for example, the elevating mechanism that moves the elevating unit 60 up and down in the first to third embodiments.

Next, the operation of the door device according to this embodiment will be described. First, when the door body 10 is moved, as shown in FIG.
2 is arranged at the highest position and the most outdoor position, and is completely housed in the housing 311. In this state, the door main body 10 can rotate. The lifting plate 3
02 is raised so that its upper surface forms part of the floor surface. In this state, a flat floor surface is formed.

When closing the door body 10, first, as shown in FIG.
The door body 10 is fitted into the frame so that the state shown in FIG. At this time, in a part other than the lower part of the door main body 10, the connecting part 41 of the door main body 10 and the connecting part 51 of the frame part are connected. Next, the elevating mechanism 302 lowers the elevating plate 302 from this state. Next, the motor 322 is operated to lower the movable plate 318. Then, the connecting portion 31
2 protrudes downward from the opening 311a of the housing 311 and enters the groove 301 below the floor surface. When the connecting portion 312 descends most, the motor 316 is operated, and the connecting portion 3
12 is moved to the indoor side. Then, as illustrated in FIG. 17, the coupling unit 312 is coupled with the coupling unit 323. Thereby, an electromagnetic wave shielding function is exhibited.

As described above, in the door device according to the present embodiment, the door body 10 is raised and lowered so as to be able to select between a state in which the door body is disposed on the floor surface and a state in which the door body is protruded below the floor surface. It has a possible joint 312 and an elevating mechanism for raising and lowering the joint 312. On the other hand, the frame portion is arranged below the floor surface, and the groove portion 3 for guiding the coupling portion 312 below the floor surface.
01, a coupling portion 323 arranged in the groove portion 301 and capable of coupling with the coupling portion 312 in a state of protruding below the floor surface, and the elevating plate 30 selectively covering the groove portion 301.
And 2. Therefore, according to the door device of the present embodiment, when the door body 10 is closed, good electromagnetic wave shielding characteristics can be obtained by the connecting portion 312 of the door body 10 and the connecting portion 323 of the frame portion. Further, according to the door device of the present embodiment, when the door main body 10 is opened, the flat portion can be realized by covering the groove portion 301 with the elevating plate 302, thereby achieving a favorable low level in an anechoic chamber. The frequency magnetic field characteristics can be obtained, and the loading and unloading of a measured object and the like become easy.

Further, according to the present embodiment, even if the upper surface of the elevating plate 302 is stained or damaged by carrying in or out of the object to be measured, the coupling portion 323 is not stained or damaged. The electromagnetic wave shielding performance of the door device is prevented from deteriorating by carrying in and out of an object or the like.

The other configurations, operations and effects of the present embodiment are the same as those of the first embodiment.

The present invention is not limited to the above embodiments, but can be variously modified. For example, the structure of the connecting portion between the door body and the frame is not limited to the structure described in the embodiment, but may be another structure as long as good electromagnetic wave shielding performance can be obtained. In addition, the present invention is not limited to an anechoic chamber,
It can also be applied to an electromagnetic wave shielding room.

[0094]

As described above, claims 1 to 6
8. The electromagnetic wave shielding door device according to claim 1,
According to the electromagnetic wave shielding coupling device according to any one of (1) to (12), a state in which a part of the frame portion is arranged on the floor surface so as to be able to be coupled to a lower portion of the door body and a flat floor surface are used. Since it is provided with an elevating unit that can be moved up and down so that it can be selected to be stored under the floor surface to be formed, and an elevating unit that elevates the elevating unit, good electromagnetic wave shielding characteristics can be obtained. At the same time, there is an effect that a flat floor surface can be realized.

According to the electromagnetic wave shielding door device of the invention or the electromagnetic wave shielding coupling device of the invention, the elevating portion is housed under the coupling portion coupled to the lower portion of the door body and under the floor. And the upper surface that forms a part of the floor surface when it is carried out. There is no dirt or damage, and the effect of preventing the electromagnetic wave shielding performance of the door device from being deteriorated by carrying in and out of the measured object can be prevented.

According to the electromagnetic wave shielding door device of the third aspect, when the door main body and the frame are respectively connected to each other, an electric connection is made between the frame and the door main body. Since the electric connection means is provided, the effect of further improving the electromagnetic wave shielding function can be obtained.

According to the electromagnetic wave shielding coupling device of the ninth aspect, when the lifting unit is coupled to the lower part of the door main body, the electric connection means for making an electric connection with the door main body. Therefore, the effect of further improving the electromagnetic wave shielding function can be obtained.

According to the electromagnetic wave shielding door device of the thirteenth or fourteenth aspect, the door body can be selected from a state arranged on the floor surface and a state arranged so as to protrude below the floor surface. Has a first connecting portion that can be moved up and down, and lifting means for raising and lowering the first connecting portion. The frame portion is arranged below the floor surface, and the first connecting portion is placed below the floor surface. A groove to guide,
A second coupling portion disposed in the groove portion and capable of coupling to the first coupling portion in a state of protruding below the floor surface, and selectively covering the groove portion to form a part of the floor surface With such a configuration, it is possible to obtain good electromagnetic wave shielding characteristics and to achieve a flat floor surface.

According to the electromagnetic wave shielding door device of the present invention, when the door main body and the frame are respectively connected to each other, an electric connection is made between the frame and the door main body. Since it has an electrical connection means,
There is an effect that the electromagnetic wave shielding function can be improved.

[Brief description of the drawings]

FIG. 1 is a plan sectional view showing an example of a configuration of a test facility including an anechoic chamber according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the door device according to the first embodiment of the present invention as viewed from the outdoor side.

FIG. 3 is a front view of the door device according to the first embodiment of the present invention as viewed from the outdoor side.

FIG. 4 is a side view of the door device according to the first embodiment of the present invention.

FIG. 5 is a plan view of the door device according to the first embodiment of the present invention.

FIG. 6 is a perspective view of the lifting unit according to the first embodiment of the present invention;
It is a front view of the state arrange | positioned on the floor surface.

FIG. 7 is a schematic view of the lifting unit according to the first embodiment of the present invention;
It is sectional drawing of the state couple | bonded with the door main body.

FIG. 8 is a view illustrating a lifting unit according to the first embodiment of the present invention;
It is sectional drawing of the state accommodated under the floor.

FIG. 9 is an explanatory view showing a lifting mechanism according to the first embodiment of the present invention.

FIG. 10 is a perspective view showing a handle for operating the elevating mechanism according to the first embodiment of the present invention.

FIG. 11 is a plan view showing the configuration and operation of a rotating mechanism according to the first embodiment of the present invention.

FIG. 12 is an explanatory diagram illustrating a schematic configuration of a door device according to a second embodiment of the present invention.

FIG. 13 is an explanatory diagram illustrating a schematic configuration of a door device according to a third embodiment of the present invention.

FIG. 14 is a side view of a door device according to a fourth embodiment of the present invention.

FIG. 15 is an explanatory view conceptually showing a main part of a door device according to a fifth embodiment of the present invention.

FIG. 16 is a sectional view showing a main part of a door device according to a fifth embodiment of the present invention.

FIG. 17 is a cross-sectional view showing another state of the main part of the door device according to the fifth embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Door device for electromagnetic wave shielding, 10 ... Door main body, 15 ... Support part, 30 ... Rotating mechanism part, 41 ... Coupling part, 50 ... Frame part, 5
DESCRIPTION OF SYMBOLS 1 ... Connecting part, 60 ... Elevating part, 71 ... Roller, 72 plate cam, 73 ... Rack, 74 ... Pinion, 75 ... Reduction gear, 7
6 ... steering wheel.

──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hideaki Kitade 11 Nakajima-cho, Kaga-shi, Ishikawa Prefecture Inside Kaga Seiko Co., Ltd. (56) References JP-A-10-294591 (JP, A) JP-A-10-148068 (JP, A) JP-A-5-33566 (JP, A) JP-A-7-263893 (JP, A) Kaihei 4-69598 (JP, U) JP-A 6-20702 (JP, U) JP 6-38477 (JP, Y2) (58) Field surveyed (Int. Cl. ⁷ , DB name) G12B 17 / 02 E06B 5/18 H05K 9/00

Claims (14)

(57) [Claims] An electromagnetic wave shielding door device having an electromagnetic wave shielding function for opening and closing an opening formed in a wall having an electromagnetic wave shielding function, comprising: a door body having an electromagnetic wave shielding function; and a periphery of the opening. And a frame portion coupled to the door body, wherein the frame portion is arranged on a floor surface so as to be connectable to a lower portion of the door body and forms a flat floor surface. An electromagnetic wave shielding door device, further comprising an elevating unit which can be moved up and down so as to be able to select a state of being housed under the floor, and further comprising elevating means for elevating the elevating unit. 2. The method according to claim 1, wherein the lifting unit includes a coupling unit coupled to a lower portion of the door main body and an upper surface unit that forms a part of the floor when stored under the floor. Item 2. An electromagnetic wave shielding door device according to Item 1. 3. The door body and the frame portion each have an electric connection means for making an electric connection between the frame portion and the door body when connected to each other. The electromagnetic wave shielding door device according to claim 1 or 2, wherein: 4. The electromagnetic wave shielding door device according to claim 1, wherein the lifting means is manually operated. 5. The electromagnetic wave shielding door device according to claim 1, wherein the elevating means operates electrically. 6. The electromagnetic wave shielding door device according to claim 1, wherein the lifting / lowering means operates in conjunction with the door main body. 7. A door body having an electromagnetic wave shielding function, and a frame portion provided around an opening formed in a wall having an electromagnetic wave shielding function and coupled to the door body, and opens and closes the opening. The electromagnetic wave shielding door device having an electromagnetic wave shielding function for forming a part of the frame portion, and is disposed on the floor surface so as to be able to be coupled to a lower portion of the door body and a flat floor surface An electromagnetic wave shielding coupling device, comprising: an elevating unit that can be moved up and down so as to be able to select between a state in which the unit is stored under the floor so as to form an elevating unit, and an elevating unit that moves up and down the elevating unit. . 8. The elevator according to claim 1, wherein the lifting unit includes a coupling unit coupled to a lower portion of the door main body and an upper surface unit that forms a part of the floor when stored under the floor. Item 7. An electromagnetic wave shielding coupling device according to Item 7. 9. The elevator according to claim 7, wherein the elevating unit has an electric connection unit for making an electric connection with the door main body when the elevating unit is coupled to a lower part of the door main body. A coupling device for shielding electromagnetic waves according to claim 8. 10. The electromagnetic wave shielding coupling device according to claim 7, wherein said lifting means is operated manually. 11. The electromagnetic wave shielding coupling device according to claim 7, wherein the elevating means operates electrically. 12. The electromagnetic wave shielding coupling device according to claim 7, wherein said lifting means operates in conjunction with said door body. 13. An electromagnetic wave shielding door device having an electromagnetic wave shielding function for opening and closing an opening formed in a wall having an electromagnetic wave shielding function, comprising: a door body having an electromagnetic wave shielding function; And a frame portion coupled to the door body, wherein the door body can be moved up and down so as to be able to select between a state arranged on the floor surface and a state arranged so as to protrude below the floor surface. A first connecting portion, and an elevating means for raising and lowering the first connecting portion, wherein the frame portion is disposed below the floor surface and guides the first connecting portion below the floor surface. And a second coupling portion disposed in the groove portion and capable of coupling to the first coupling portion in a state where the second coupling portion is disposed so as to protrude below the floor surface; and selectively covering the groove portion. And a floor portion forming a part of the floor surface. Location. 14. The door body and the frame portion each have an electrical connection means for making an electrical connection between the frame portion and the door body when coupled to each other. 14. The door device for shielding electromagnetic waves according to claim 13.